Summarized Financial Data - Chevron Transport Corporation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 54,296	[1]	$ 58,896	[1]
Costs and other deductions	46,535		48,636
Net loss attributable to CTC	6,178		6,471
Chevron Transport Corporation [Member]
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	131		145
Costs and other deductions	172		183
Net loss attributable to CTC	$ (41)		$ (38)

[1] * Includes excise, value-added and similar taxes:2,033 1,787